The NFL has seen some explosive offenses in the past few years. In 2007, the New England Patriots set a record by scoring 589 points in the regular season. The 2011 Green Bay Packers finished as the second-best offense in NFL history, and last year’s Patriots came two points per game shy of the all-time mark. In 2013, however, the Denver Broncos may surpass all of those teams.

Through four weeks, the defending AFC West champs have been unstoppable. The New England team that went undefeated averaged 36.8 points per game. Thus far, the Broncos are scoring just a shade under 45. In Week Five, they’ll look to continue their dominance when they visit the Dallas Cowboys.

Dallas will try to be the first team to remain competitive with Denver for a complete game. At 4-0, all of the Broncos wins have come by at least 16 points.

Peyton Manning is the midst of a historical season at the quarterback position. He’s leading all signal callers in every major statistical category -- passing yards, completion percentage, touchdowns and rating. Along with his 16 scores, Manning has yet to thrown an interception.

"He's efficient, man," Broncos defensive back Champ Bailey said. "And hopefully he gets better -- I don't know how, but hopefully he does -- because this guy's a prime example of what it takes to be a great quarterback in this league.”

There isn’t much reason to believe that the Cowboys secondary will have any more success than the teams that have come before them. Quarterbacks are averaging 382.3 passing yards per game against Dallas. Both Philip Rivers and Eli Manning went for over 400. Now, they’ll have to contend with the likes of Demaryius Thomas, Eric Decker and Wes Welker.

If the Cowboys are going to win a shootout, they have a quarterback who’s good enough to give them a chance. Tony Romo is off to, arguably, the best start of his career. He hasn’t been as good as Manning, but his eight touchdowns and one interception have made him one of the best in football. In his eighth year as a starter, the much maligned quarterback might be playing better than he ever has before.

“He’s has had this thing where he’s turned the ball over in the past in tough situations,’’ said Bailey, in regards to Romo. “He’s not doing that this year. That is probably the biggest difference in the offense from the previous offenses I’ve seen from them. He’s playing great.’’